Finding the Third Proportional to 163,990.50 and 353,820

Step by Step Solution

1. Step 1: Write the proportion equation
   163,990.50 : 353,820 = 353,820 : x
2. Step 2: Convert to fraction form
   163,990.50/353,820 = 353,820/x
3. Step 3: Cross multiply
   163,990.50x = 353,820 × 353,820
4. Step 4: Simplify right side
   163,990.50x = 125,188,592,400
5. Step 5: Solve for x
   x = 125,188,592,400/163,990.50
6. Step 6: Final answer
   x = 763,389.30